<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>有序列表</title>
</head>
<body>
<h3>有序列表</h3>
<ol>
    <li>ordered list</li>
    <li>list item</li>
    <li>essence 精髓</li>
</ol>
</body>
</html>